Rechargeable Battery Can Segmented Pipe and Bottom Plate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing process of rechargeable battery cans is complex and costly due to multi-step drawing processes, which complicates productivity and increases production costs.
Innovation Solution
A simplified manufacturing method involving slitting a metal sheet into a unit size, forming it into a pipe with a side seam, and bonding a bottom plate to create a can with a side and bottom seam, allowing for easier assembly and reduced costs, while enhancing electrolyte capacity and heat radiating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-step drawing process is used to form the can, then the can can be manufactured with proper shape and structure, but the manufacturing process becomes complex and productivity deteriorates
Solution Approach 1:
The can manufacturing process is divided into two independent stages: first forming a simple cylindrical pipe through single-step drawing, then assembling the pipe with a separately manufactured bottom plate through seam welding. This segmentation eliminates the need for complex multi-step drawing processes while maintaining can structural integrity.
2Manufacturing precision
If a multi-step drawing process is used to form the can, then the can can be manufactured with proper shape and structure, but production cost increases due to multiple molds
Solution Approach 1:
The can is segmented into a pipe body and bottom plate that can be manufactured independently using simple single-step drawing processes and standard seam welding equipment, eliminating the need for expensive multi-step drawing molds.
Solution Approach 2:
The manufacturing process merges simple single-step drawing operations with seam welding technology to achieve the same result as complex multi-step drawing, reducing equipment investment and production costs.
3Device complexity
If a simple pipe structure is used without bottom plate bonding, then the manufacturing process is simplified, but the can cannot properly enclose and seal the electrode assembly
Solution Approach 1:
The bottom plate is prepared in advance with a curled edge structure, and the pipe is prepared with a flange structure, so that when assembled through seam welding, they automatically form a sealed connection that properly encloses the electrode assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method increases productivity, reduces production costs, enhances the battery's capacity, and improves heat radiating performance by simplifying the manufacturing process and optimizing the can's design.
Implementation Method 1
a bottom plate bonded to a first opening of the pipe by a bottom seam portion to close and seal the first opening
Implementation Method 2
a cap assembly bonded to a second opening of the pipe formed at the other side of the bottom plate to close and seal the second opening
Data Source
AI summary
A rechargeable battery having an electrode assembly formed by depositing/spiral-winding an positive electrode and a negative electrode on respective surfaces of a separator; a can including a pipe having a side seam portion to enclose the electrode assembly and a bottom plate bonded to a first opening of the pipe by a bottom seam portion to close and seal the first opening and facing an end portion of the electrode assembly; and a cap assembly bonded to a second opening of the pipe formed at the other side of the bottom plate to close and seal the second opening.